Ink-feeding mechanism for printing-machines.



APPLICATION FILED JUNE 11. 1909.

INVENTOR 4%! 1 40 WITNESSES J. J. HALLIWELL. INK FEEDING MECHANISM FOR.PRINTING MACHINES. APPLICATION FILED JUNE 11, 1909.

967,906. Patented Aug.23,1910.

4 SHEETSSHEET 2.

J. J. HALLIWELL.

INK FEEDING MEGHANISM FOR PRINTING MACHINES.

APPLICATION FILED JUNE 11 1909.

Patented Aug. 23, 1910.

4 SHEETS-SHEET 3.

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WITNESSES.

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J. J. HALLIWELL. INK FEEDING MEcIIANIs'M FoR PRINTING MAGHINES.

APPLICATION FILED JUNE 11, 1909.

Patented Aug; 23, 1910.

4 SHEETS-SHEET 4.

ll ll 2 I INVENTOR UNITED STATES PATENT OFFICE.

JOHN J'. HALLIWELL, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS,TO B. HOE AND 00., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

INK-FEEDING MECHANISM FOR PRINTING-MACHINES.

To all whom it may concern:

Be it known that I, JOHN J. HALLIWELL, a citizen of the United States,residing at New York, county of New York, and State of New York, haveinvented certain new and useful Improvements in Ink-Feeding Mechanismfor Printing-Machines, fully described and represented in the followingspecification and the accompanying drawings, forming a part of the same.

This invention relates to certain improvements in inking mechanism forprinting machines.

In a well-known type of inking mechanism, there is employed aductor-roll which takes ink from an intermittently operatingfountainroll and transfers it to a roll running continuously and at highspeed, the direction of movement of this roll being the same as that ofthe fountain roll. In this type of inking-mechanism, the amount of inkfed from the fountain is determined by the amount of circumferentialmovement given the fountain roll. Furthermore, the ductor roll ismounted loosely in its bearings and while in contact with theink-receiving roll which is running at a very high speed, is caused torotate rapidly. When the ductor roll which is thus rapidly rotating isbrought in contact with the fountain-roll, it tends to rotate thefountain-roll in the direction of its feeding movement, so that thefountain roll is not only given its feeding movement but given anadditional forward movement by the ductor-roll, the result of which isto cause too much ink to be delivered to the ductor roll.

This invention has for its object to produce a simple, cheap andeffective, and at the same time positively operating stopmechanism bywhich the -fountainroll is positively locked against movement exceptduring such times as it is being operated by its feeding mechanism, thuspreventing the fountain-roll from being turned by the momentum of theductor roll.

With this and other objects not specifically referred to in view, theinvention consists in certain constructions, and in certain parts,improvements and combinations as will be hereinafter fully described andthen specifically pointed out.

In the accompanying drawingsFigure 1 is a side elevation of aconstruction of inking mechanism embodying the invention.

Specification of Letters Patent.

Application filed June 11, 1909.

Patented Aug. 23, 1910. Serial No. 501,457.

Fig. 2 is a sectional plan View of the construction illustrated in Fig.1, the section being taken on the line 22 of Fig. 1. Fig. 3 illustratesa modified form of construction embodying the invention. Fig. 4 is aView similar to Fig. 3 but showing the parts in a different position.Fig. 5 is a sectional plan view of the construction illustrated in Fig.

Referring to said drawings, and more particularly to the constructionillustrated in Figs. 1 and 2, 1 indicates an ink-fountain of usual typeprovided with the usual fountain-roll 2 mounted on a shaft 3. The inkfrom the roll 2 is delivered by a ductor-roll 4 to a distributing roll 5with which cooperate other distributing rolls 6, 7 8, the roll 8 servingto deliver the ink to another ink roll 9. The ductor 4 is mounted on ashaft 10 mounted in bearings on swinging arms 11, there being one ofthese arms 011 each side of the machine. In the particular constructionillustrated, these arms are fast to a rock-shaft 12 provided with an arm13 carrying a roll 14 cooperating with a cam 15 mounted on a shaft 16extending across the machine, the roll 14 being held against the cam bymeans of a spring rod construction, 17, of the usual type. The roll 5 isdriven from the roll 9 by an intermediate 18 mounted on a stud 19, saidintermediate having fast to it a small pinion 20 meshing with a gear 21mounted on a stud 22, said gear 21 having fast to it a pinion 23 whichdrives a gear 24 on the shaft 16.

The construction so far described is a well-known type and any othersuitable mechanism for performing the functions of the constructionillustrated may be substituted therefor.

I11 constructions embodying the invention the fountain roll will, as arule, be given an intermittent movement. While the means by which thismovement is effected may be varied, in the particular constructionillustrated, a short shaft 25 mounted in the frame is provided, saidshaft having mounted thereon a pawl carrier which includes a hub 26located inside the frame. This hub has projecting from it an arm 27 onwhich is pivoted a pawl 28 the pawl being backed up by a leafspring 29,as is usual in such constructions. The hub 26 is fast on the shaft 25.This shaft 25 has mounted on its front end in front of the frame a hub30 from which projects an arm 31 having pivoted to it at 32' a bar 33provided at its outer end with a slot 34 engaging a crank stud 35movement may be given the fountain roll so as to cause this roll todeliver more or less ink to the ductor-roll, as required. While themeans by which this is accomplished may be varied, in the particularconstruction illustrated, the hub 30 has projecting there from a handle38 having connected to it a spring rod construction 39 of the usualtype. In line with this handle and fast on the frame there is located astop plate 40 having pin-holes 41 therein in any of which holes a pin 42may be inserted to limit the downward movement of the handle.

As the parts are shown in Fig. 1, the

. feeding pawl has just completed its feeding stroke. As the stud 35continues its rotation, the spring rod 39 will force the handle 38downward until it strikes the pin 42. This checks the motion of thehandle, the crank disk and stud continuing to revolve, this motion beingpermitted by the slot 34 in the bar 33 in which the stud works. It willbe understood, therefore, that the take of the pawl 28 is determined bythe position of the pin 42. If desired, the handle may be provided witha guard, as 42, to

prevent placing the pin above the handle instead of below it, it beingunderstood that changes in adjustment are usually made while the machineis running.

It will be understood that the roll 5 to which the ductor 4 transfersthe ink from the fountain roll 2 is a rapidly revolving roll, this roll,in certain types of machines, running as high as six hundred revolutionsa minute, or even higher. When, therefore, the,roll 4 touches it totransfer the ink to it, it is also caused to rotate very rapidly, itbeing understood that it is loosely journaled in its bearings. When,therefore, the roll 4 swings back into contact with the fountain roll,it is running very rapidly and its momentum will cause a forward feed ofthe fountain roll unless devices are employed for preventing thisaction. Constructions embodying the invention will, therefore, include apositively operating stop mechanism for'preventing thefountain roll frombeing turned by the momentum of the ductor roll. The details ofconstruction of this stop mechanism may be varied within wide limits,and two forms of construction are shown.

- Referring more particularly to the construction illustrated in Figs. 1and 2, the

shaft 3 of the fountain roll is provided with a ratchet 43 its teethfacing in a direction opposite to that of the teeth of the ratchet 37.The ratchet 43 is engaged by a pawl 44 pivoted at 45 to an arm 46, thepawl being backed up by the usual leaf spring 47. This arm 46 projectsfrom a hub 49 fast on a short shaft 50 mounted in the frame, this shafthaving also mounted upon it a hub 51 from which projects an arm 52. Thisarm 52 is connected by a slotted rod 53 to a crank stud on the shaft 16,it being understood that this shaft extends across the machine. Thiscrank stud and the crank disk on which it is mounted are not shown, forthe reason'that they would be exactly behind the corresponding disk' 36and stud 35 in Fig. 1. From this'description of the construction it willbe understood that the two pawl carrying arms 27 and 46 begin theirbackward movement simultaneously and may be moved in synchronismthroughout both the backward and the forward strokes,

this depending, however, on the position of the pin 42. The differencein the movement is that the arm 46 always has a definite stroke, whereasthe arm 27 has a varying stroke depending on the position of the pin. Atthe time, however, the roll 4 strikes the fountain roll, the backwardstroke of the arm 46 has been completed and its pawl 44 has engaged theteeth of the ratchet 43. It is during the forward stroke of the arm 46that the roll 4 comes into contact with the roll 2, but this pawl 44prevents any forward movement of the fountain roller. The pawl 28 maycome into operation at any time during the forward stroke of the arm 46,but inasmuch as the two pawls 44 and 28 are moving synchronously, thefountain roll cannot run away from the pawl 28. As the pawl 44 completesits forward stroke, it is thrown out of engagement with the teeth of itsratchet 43 in any suitable manner, as, for instance, by a pin 54 whichstrikes the tail of the pawl. A similar pin, as 54', may be employed toinsure the engagement of the pawl with its ratchet.

In the construction shown in Figs. 3, 4 and 5, the shaft 25 is employedas before, this-shaft being connected with the fountain roll shaft 3 inany suitable manner, as, for instance, by a clamp couplin 55 (see Fig.5). This shaft is provide outside the frame with two ratchets 56, 57,these ratchets being fast on the shaft. Outside the ratchets and looseon the shaft is a hub 58, this hub being provided with two pawl carryingarms 59, 60, the arm 59 having pivoted to it at 61 a pawl 62, this pawlengaging the teeth of the ratchet 57. The arm has pivoted to it at 63 apawl 64 which engages the teeth of the ratchet 56. The hub may also beprovided, to efiect the variable movement before referred to, with ahandle 38 and a spring rod construction 39 similar to that beforedescribed. The hub also has an arm or projection 65 to which is pivotedat 66 a slotted bar 67, this bar being similar to the bar 88 beforedescribed and receiving its movement from any suitable cam or crank onthe machine. The pawls 62 and 64: may be backed up by springs 68, 69, asin the construction already described and a throw out pin 70 may beemployed in connection with the pawl 64:. The operation of theconstruction is similar to that already described, except that the twopawls are eX- actly synchronous throughout their entire movement, thatis, they are always in engagement with the ratchets at the same time andhave the same length of stroke. Inasmuch as the teeth of the ratchetsface in opposite directions, it will be seen that the ductor roll cannotcause an over-feed of the fountain roll. In this construction, also, thepin 42 before referred to acts not only to regulate the amount of takeof the feed pawl, but it also acts to throw the pawl 64 into engagementwith its ratchet, the'per forations in the plate 40 being so disposedthat the pawl will strike this pin as the handle 38 moves downward underthe infiuence of the spring rod 39.

Changes and variations may be made in the construction by which theinvention is carried into efiect. The invention is not, therefore, to beconfined to the particular constructions herein shown and described.

IVhat is claimed is L 1. In an inking mechanism, the combination with afountain roll, of a ductor roll, a distributing roll receiving ink fromthe ductor roll and rotating in the same direction as the fountain roll,feeding and stopping ratchets operatively connected with the fountainroll, pawls cooperating with the ratchets, and operating means for thepawls, the operating means for the stopping pawl causing it to remain inengagement with its ratchet while the feeding pawl is in engagement withits ratchet.

2. In an inking mechanism, the combination with a fountain roll, ofoppositely facing ratchets connected therewith, a ductor roll, a rollreceiving ink from the ductor roll and turning in the same direction asthe fountain roll, feeding and stopping pawls cooperating with theratchets, and operating means for the pawls, the stopping pawl being inengagement with its ratchet while the feeding pawl is operating.

3. In an inking mechanism, the combination with a fountain roll, offeeding and stopping ratchets o oerat-ively connected therewith, feedingan stopping pawls cooperatively connected with the ratchets, means forgiving the feeding pawl and ratchet a variable movement, and means foroperating the stopping pawl and ratchet, said stopping pawl being causedto remain in engagement with its ratchet while the feeding pawl isoperating.

4:. In an inking mechanism, the combination with a fountain roll, offeeding and stopping ratchets operatively connected therewith, saidratchets facing opposite ways, feeding and stopping pawls cooperativelyconnected with the ratchets, means for giving the feeding pawl andratchet a variable movement, and means for operating the stopping pawland ratchet, said stopping pawl being caused to remain in engagementwith its ratchet while the feeding pawl is operating.

In testimony whereof, I have hereunto set my hand, in the presence oftwo subscribing witnesses.

JOHN J. HALLIVELL. Witnesses:

F. W. H. CRANE, GEO. V. WILLIAMSON.

